Specific Anatomic RegionAdrenal Glands
ApplicationR/O Adrenal Mass
AuthorFishman EK
Reference SourcePersonal Communication
Scanner UsedSiemens Plus4 Volume Zoom
KV / mAs / Time per Rotation (sec)120/165/.5
Detector Collimation (mm)4x 2.5 or 4 x 1.0
Slice Thickness (mm)3 or 1
Data Reconstruction Interval (mm)2 or 1
Table Speed (mm per rotation) / Pitch12.5/5 or 6/6
Oral Contrast750 cc water
IV Contrast Volume and TypeN/A 
  Injection RateN/A
  Scan Delay (sec)N/A
3D Technique UsedNot routinely needed
Comment:
  • Noncontrast studies are ideal for determining whether a lesion is an adenoma based on its CT attenuation.(< 18 HU)
  • IV contrast may be helpful if there is a high clinical suspicion of a neoplasm, as vascular involvement can be identified.
  • Enhancement patterns may be valuable in defining a pheochromcytoma (very vascular).